Retarding device for plunger-elevators.



No. 810,404; PATBNTED JAN. 23, 1906. P. c. FURLOW. RETARDING DEVICE FORPLUNGER ELEVATORS.

APPLICATION FILED OUT. 31. 1904.

ATTORNEY for Pluugcr-Elm'ators, of which the following I 30 designatesa. three-way or reversing paratus which I use in carrying out my in.-

head 13 below its stalling-box by a pipe 33.

UNrran s'rATEs PA'rns r orrioa.

- FLOYD URLXHV, UF MONTULAIR, NEW' JERSEY, ASSIGNOR'TO ()TlS lLl1\/\'l() l COR/IPA NY OF EAST ORANGE, NE'W JERSEY, A CORPO RATIUN OE-NlfiiV JERSEY. I

H ETARDING DEVICE FOR PLUN EiR-ELEVATQRS.

I Specificatio'nof'Letters Patent. Patented J an. 23. 190R u aatn filedOctober'Sl, 1904. Serial No. 230,767.

To ail whom it may concern: they afi'ord communication between it and Beit known that I, FLoYuC. FURLOW, a either the pipe 31 or the pipe 32.These citizen of the United States,residing at Montpipes 31 and 32 areconnecte respectively,

clair, in the county of Essex and State of to asource of hydraulic powerand to an ex New Jersey, have invented certain new and ,haustr Apilot-valve is situated near this useful Improvements in ltetardingDevices i three-way or reversing valve andis connected to thesupply-pipe at 51 and tothe exhaust-pipe at 52. It is also connected toone end of the reversing-valve 30 at 53. The' valve-stem 5e of thisvalve is connected toan arn1 55, which is attached to the segment 24..It is so arranged that when. the operator in the car moves the lever 20to thelel't or to the is a specification.

My invention relates to retarding devices for plunger-elevators; and itsobject is to provide means for overcoming the momentum of suchelevators.

.l ike characters of reference designate correspfmding parts in all ofthe figures, in j'right he thereby moves the valve-stem 54 of wh1chthepilot-valve up or down. The'pilot-valve Figure 1 shows in side elevationa plungcr 'elevatorembodying my invention. Fig. 2 is" either directionto cause it to open or close its an enlarged plan view of the part ofthe apnected to the main-valve stem 34. ln-this vention. In this figurethe plunger is shown in cross-section. Fig. 3 is a side view of one ofthe parts shown in Fig. 2. Fig. 4 is a side ')ly or exhaust to thehydraulic cylinder 12 he elevatLon of a coumerweight with a part of lthe invention attached thereto. Fig. 5 is a view of certain parts inside elevation of a' modification oi" my invention. Fig. 6 shows anothermodification. j

Referring now to the drawings, 10 designates an elevator-car, which isattached to the top of a plunger 11.

i2 is a hydraulic cylinder, in which the plunger 11 runs through acylinder-imam! and stullingbox 1.3.

A rope or cable. 14 is attached to the top of the car and runs up over asheave 15, which is situated at the top of the elevator-hatch way. Therope or cable 14 passes over this. sheave and down to a counterweight16. In the car 10 is placed an opcrating-lever 20, which is arranged tomove tilting sheaves 21 21. Two operating-ropes22 22 are attached tofixtures 23 23 at the top'of the hatchwayand descend'to a point near thebottom of the hatchway, where they pass under a pivoted segment 24,wwhich they are attached. Between the supports at the top of thehatchway and the's egment 24 these...ropes 22 22 pass'around the tiltingsheaves 2112.1.

connected car to move up or down and to stop. The above is well known inthe art and illustrative of one type of construction to which thelnvention may be applied.

high speeds and high rises. \Vh'encver such an elevator 1s used'l'oralngh rise, it is found desirable to have the counterweight 1 (i ofweight of the plunger 11, which increases the .dilliculty of stoppingthe movement accurately. Above the stulling-box and cylinder-head 13 Iplace a retarding device or brake 40. This retarding device or braketier-head or any stationary fixture near the limit of the travel of thecar 10. v This retard- 1t com rises two jaws, 41 and 42, which are.pivote( to a fixedpoint 43. These two jaws surround the plunger 11. Theouter ends of the j'awsel 42 are arranged to cross each other, asshoyvnat 44 and 45. "The cam 46 is pivoted between these two projecting endsof the 'aws at 47. {times an attached arm or level 48' extending oneside. This lever valve, which is connected to the cylinder- This valveis arranged to close the port lead ing to the pipe 33 or to open them,so that way the operator has complete control of the valve. 30, and asthis valvecontrols' the supis arranged to actuate the main valve inports by moving its pistons, which are conherelore is able to cause theplunger and its i needs no further description, but is merely It hasbeen found dillicult in operating elevators of this type to bring themto rest within a short distance, especially when they are made forconsiderable Wieght to partially balance the may be supported bysomepartof the c \'lintop of the cylinder 12 and'below the lower 1 ingdevice or brake is shown clearly in Fig. 2.

2.1111 a hydraulic elevator, the combination with a car and a plunger,of a retarding device for suchplunger, and means within the control ofthe operator on the car for applying and releasingsuch retarding device.

3..In a hydraulic elevator, the combination with a plunger and a car, ofa retarding 7 device for the plunger, and means controlled from the carfor starting and stopping said car and for applying and releasing saidretarding device.

4.1In a hydraulic elevator, the combination with a plunger and a valve,of a retarding device for the plunger, said retarding devicfe being ac'tuated by the movement of the i'r1g valve,,and connections from the saidvalve to the retarding device for actuating the same.

7 In a hydraulic elevator system, the-combination of a plunger, a carattached to the plunger, acounterweight attached to the car, a retardingdevice for the plunger, a retarding device on the counterweight, and asingle -means for actuating said retarding devices from the car..

8. In a hydraulic elevator the combination of a plunger and a car, aretarding device for the plunger, and means situated upon the car forcontrolling the starting, stopping and reversing the movement of the'carand actuating the retarding device at the same time.

9; The combination with a car, of. a coun-.

terweight. and a plunger connected respectively to thetop and bottom ofthe car, a gripping-device for the plunger, means for controlling themovements of the car and plunger, and means for operating said grippin'gdevice and controlling means from the car.

.10. The combination with a car, of a conn- -terwe i 'ht, a plunger forsaid car, means for controIling the movement of ;the car and (plunger, abrake for said plunger, anda sin gle means for operating saidcontrolling means, ,a'nd'a leverfor actuating said operatingtmeansm, 1 vv 11.- Thecombination with a car, ofa counterweight,; a-plungerconnected to the car,

6 means for controllin the movement of said ear and plunger. a. rake forsaid counterweighnjnd T-mearisfor operating said brake and-controllingmeans from the car.

-. J 12.;In an, elevator, the combination with a fcarefidm8811l3i0I"mQWl!lgSam8, of a counterweight, a retarding device for thecounterweight, and means for, positively actuating said retardingdevice. i

13. In an elevator, the combination with a car and means for movingsame, of'ac0unte1'' weight, a retarding device for the counter--vweight, and means controlled from the car for applying andreleasing-such retarding device.

14. In an elevator, the con'ibination with a car, of a counterweighttheretor, a retarding device for such counterweight, and means withinthe control of the operator on the car for applying and releasing suchretarding device.

car and its counterweight, of a retarding de vice for the counterweight,and means con 15. In-anelevator, the combination with a trolled from thecar for starting and stopping.

said car and for applying retarding device.

16. In a hydraulic elevator, the combination with a car and a plunger,ol" a counterweight, valve mechanism for controlling the and releasingsaid movement of said car and plunger, a brake for the counterweight,connections for operating'said valve mechanism and said bra -e, and asingle means ior actuating sa1d'connec-:

tions from the-car.

f 17. In a hydraulic elevator, the combination with a car and a plunger,of a 'counter-. Weight, a brake for said counterweight, and meansactuated from the car for controlling the starting, stopping andreversing of the movement of the car and plunger and actuating saidbrake substantially at the same time.

18. In an elevator, the combination with a car and a counterweightconnected thereto, of guides for said counterweight, brake-shoes, atoggle connected to the brake-shoes, a resilient means for normallyholding said brakeshoes away from the guides, and means actuated fromthe car for operating said toggle against the action of said resilientmeans to apply said brake-shoes to stop the car and counterweight. I

19. In an elevator, the combination with a car and its counterweight, ofa brake for the counterweight, brakeapplying means, a spring fornormally holding said brake and brake-applying means in releasingposition, a flexible connection between'the brake-applying means and thecar, a devi'ce on the car for- -20. In a hydraulicelevator, thecombina.-.

'tion.vvith a plunger and a 'car, of a grip ling device for saidplunger, andmeans for releas ing and controlling the application of saidgripping device from the ear.

' 21; In a hydraulic elevator, the combination with a plunger and a car,of a brake for me a-see "38. In a hydraulic elevator, the combine-.tic'm with & our and a plunger attached there to, of eeunterweightconnected. to the car, a cylinder fmithe plunger, 3 main-valve for 0011trolling said plunger, 21- pilotvaive for com trolling said main valve,brakes for the cone-- terweight and plunger, individuei means forapplying the same, and means controlled from the em to efifeet thestarting or'stopping of the ear and the release or application saldbrakes.

In wltness whereof I have subscribed 1V name in the presence of twosubscribing" 9%-

